Zobrazeno 1 - 10 of 156 pro vyhledávání: '"Jean-robert Petit"'
1
Chapter 6.2 Englacial tephras of East Antarctica
Autor: Jean-Robert Petit, Biancamaria Narcisi
Publikováno v: Geological Society, London, Memoirs. 55:649-664
Driven by successful achievements in recovering high-resolution ice records of climate and atmospheric composition through the Late Quaternary, new ice–tephra sequences from various sites of the East Antarctic Ice Sheet (EAIS) have been studied in
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::eec068ea091c022cad30c6570db56ba1
https://doi.org/10.1144/m55-2018-86
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4
Aeolian Dust Provenance in Central East Antarctica During the Holocene: Environmental Constraints From Single‐Grain Raman Spectroscopy
Autor: Sergio Andò, Chiara Ileana Paleari, Barbara Delmonte, Eduardo Garzanti, Valter Maggi, Jean-Robert Petit
Publikováno v: Geophysical Research Letters. 46:9968-9979
We analyzed the single-grain mineralogical composition of aeolian dust transported to central East Antarctica for provenance purposes. Comparison with data from the last glacial period shows for the first time disappearance of carbonates during the H
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e4a18c284da32e633b1a5e434f2e1bab
https://doi.org/10.1029/2019gl083402
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5
Unknown Widespread Iron- and Sulfur-Oxidizing Bacteria beneath the East Antarctic Ice Sheet
Autor: G. P. Pavlov, D. S. Karlov, Jean-Robert Petit, M. V. Doronin, Dominique Marie, S. A. Bulat
Publikováno v: Paleontological Journal. 52:1196-1203
Comparative analysis of the Vostok ice core (Central East Antarctica; one horizon, three boreholes) and D10 ice core (shoreline nearby the French Dumont d’Urville station) has reliably revealed three phylotypes (species) of aerobic iron-oxidizing b
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::113d2e0e72b66907c8ddb90af249d86c
https://doi.org/10.1134/s0031030118100076
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6
Iron in the NEEM ice core relative to Asian loess records over the last glacial–interglacial cycle
Autor: Simon Schüpbach, Jiawen Ren, Chuanjin Li, Cunde Xiao, Yuefang Li, Jean-Robert Petit, Junji Cao, Paul Andrew Mayewski, Tong Zhang, Yeongcheol Han, Michael Handley, Zhiheng Du
Publikováno v: National Science Review
Mineral dust can indirectly affect the climate by supplying bioavailable iron (Fe) to the ocean. Here, we present the records of dissolved Fe (DFe) and total Fe (TDFe) in North Greenland Eemian Ice Drilling (NEEM) ice core over the past 110 kyr BP. T
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::726b0a2c5bb19d191959120278f9492a
https://doi.org/10.1093/nsr/nwaa144
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7
Persistent draining of the stratospheric 10Be reservoir after the Samalas volcanic eruption (1257 CE)
Autor: Mélanie Baroni, Aster Team, Jean-Robert Petit, Sophie Viseur, Edouard Bard
More than 2,000 analyses of beryllium‐10 (10Be) and sulphate concentrations were performed at a nominal subannual resolution on an ice core covering the last millennium as well as on shorter records from three sites in Antarctica (Dome C, South Pol
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::551f18ea30baa75f6330fc4478db9338
https://doi.org/10.5194/egusphere-egu2020-12957
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8
Where is the Toba eruption in the Vostok ice core? Clues from tephra, O and S isotopes
Autor: Shohei Hattori, Vladimir Ya. Lipenkov, Elsa Gautier, Joel Savarino, Francis Albarède, Jean-Robert Petit, Nicolas Caillon, Emmanuelle Albalat
The ca. 74 ka BP ‘‘super-eruption’’ of Toba volcano in Sumatra is the largest known Quaternary eruption. It expelled an estimated of 2800 km3 of dense rock equivalent, creating a caldera of 100 x 30 km. The eruption is estimated to have been
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e36251bc75c9708c2ab79cdff570083d
https://doi.org/10.5194/egusphere-egu2020-4
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9
Forty years of ice-core records of CO2
Autor: Jean-Robert Petit, Dominique Raynaud
Publikováno v: Nature. 579:505-506
In 1980, a method was found to determine the amount of carbon dioxide in ancient air trapped in polar ice — providing direct evidence that CO2 is coupled to climate, and affects global temperatures in the past, present and future. In 1980, a method
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::00e803490fd62b90ae2e041b5519d00e
https://doi.org/10.1038/d41586-020-00809-8
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10
Multiple sources for tephra from AD 1259 volcanic signal in Antarctic ice cores
Autor: Biancamaria Narcisi, Joel Savarino, Barbara Delmonte, V. G. Batanova, Jean-Robert Petit
Publikováno v: Quaternary Science Reviews
Quaternary Science Reviews, Elsevier, 2019, 210, pp.164-174. ⟨10.1016/j.quascirev.2019.03.005⟩
Quaternary Science Reviews, 2019, 210, pp.164-174. ⟨10.1016/j.quascirev.2019.03.005⟩
Strong volcanic signals simultaneously recorded in polar ice sheets are commonly assigned to major low-latitude eruptions that dispersed large quantities of aerosols in the global atmosphere with the potential of inducing climate perturbations. Paren
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::32c59c93112a18d7f18e9091f5ff31f6
https://hal.archives-ouvertes.fr/hal-02350371
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